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Ransom.MSIL.ONYXLOCKER.A

February 10, 2020
 Analysis by: Joshua Paul Ignacio
 ALIASES:

TScope.Trojan.MSIL (VBA32), Trojan-Ransom.FileCrypter (IKARUS)

 PLATFORM:

Windows

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Ransomware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It encrypts files with specific file extensions. It drops files as ransom note.

  TECHNICAL DETAILS

File Size:

18,432 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

27 Jan 2020

Payload:

Displays message/message boxes, Drops files

Arrival Details

This Ransomware arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Ransomware Routine

This Ransomware encrypts files with the following extensions:

  • .3fr 
  • .7z 
  • .accdb 
  • .ai 
  • .apk 
  • .arch00 
  • .arw 
  • .asp 
  • .aspx 
  • .asset 
  • .avi 
  • .bar 
  • .bat 
  • .bay 
  • .bc6 
  • .bc7 
  • .big 
  • .bik 
  • .bkf 
  • .bkp 
  • .blob 
  • .bsa 
  • .cas 
  • .cdr 
  • .cer 
  • .cfr 
  • .cr2 
  • .crt 
  • .crw 
  • .cs 
  • .css 
  • .csv 
  • .d3dbsp 
  • .das 
  • .dazip 
  • .db0 
  • .dba 
  • .dbf 
  • .dcr 
  • .der 
  • .desc 
  • .divx 
  • .dmp 
  • .dng 
  • .doc 
  • .docm 
  • .docx 
  • .dwg 
  • .dxg 
  • .epk 
  • .eps 
  • .erf 
  • .esm 
  • .exe 
  • .ff 
  • .flv 
  • .forge 
  • .fos 
  • .fpk 
  • .fsh 
  • .gdb 
  • .gho 
  • .hkdb 
  • .hkx 
  • .hplg 
  • .html 
  • .hvpl 
  • .ibank 
  • .icxs 
  • .indd 
  • .index 
  • .itdb 
  • .itl 
  • .itm 
  • .iwd 
  • .iwi 
  • .jpe 
  • .jpeg 
  • .jpg 
  • .js 
  • .kdb 
  • .kdc 
  • .kf 
  • .layout 
  • .lbf 
  • .litemod 
  • .lnk 
  • .lrf 
  • .ltx 
  • .lvl 
  • .m2 
  • .m3u 
  • .m4a 
  • .map 
  • .mcmeta 
  • .mdb 
  • .mdbackup 
  • .mddata 
  • .mdf 
  • .mef 
  • .menu 
  • .mkv 
  • .mlx 
  • .mov 
  • .mp3 
  • .mp4 
  • .mpeg 
  • .mpqge 
  • .mrwref 
  • .ncf 
  • .nrw 
  • .ntl 
  • .odb 
  • .odc 
  • .odm 
  • .odp 
  • .ods 
  • .odt 
  • .ogg 
  • .orf 
  • .p12 
  • .p7b 
  • .p7c 
  • .pak 
  • .pdd 
  • .pdf 
  • .pef 
  • .pem 
  • .pfx 
  • .php 
  • .pk7 
  • .pkpass 
  • .png 
  • .ppt 
  • .pptm 
  • .pptx 
  • .psd 
  • .psk 
  • .pst 
  • .ptx 
  • .py 
  • .qdf 
  • .qic 
  • .r3d 
  • .raf 
  • .rar 
  • .raw 
  • .rb 
  • .re4 
  • .rgss3a 
  • .rim 
  • .rofl 
  • .rtf 
  • .rw2 
  • .rwl 
  • .sav 
  • .sb 
  • .sid 
  • .sidd 
  • .sidn 
  • .sie 
  • .sis 
  • .slm 
  • .sln 
  • .snx 
  • .sql 
  • .sr2 
  • .srf 
  • .srw 
  • .sum 
  • .svg 
  • .syncdb 
  • .t12 
  • .t13 
  • .tax 
  • .tor 
  • .upk 
  • .vcf 
  • .vdf 
  • .vfs0 
  • .vpk 
  • .vpp_pc 
  • .vtf 
  • .w3x 
  • .wallet 
  • .wav 
  • .wb2 
  • .wma 
  • .wmo 
  • .wmv 
  • .wotreplay 
  • .wpd 
  • .wps 
  • .x3f 
  • .xf 
  • .xlk 
  • .xls 
  • .xlsb 
  • .xlsm 
  • .xlsx 
  • .xml 
  • .xxx 
  • .zip
  • .ztmp

It renames encrypted files using the following names:

  • {File Name}.кристина

It drops the following file(s) as ransom note:

  • %User Profile%\Desktop\Read-me!!! 0 .txt
  • %User Profile%\Desktop\Read-me!!! 1 .txt
  • %User Profile%\Desktop\Read-me!!! 2 .txt
  • %User Profile%\Desktop\Read-me!!! 3 .txt
  • %User Profile%\Desktop\Read-me!!! 4 .txt
  • %User Profile%\Desktop\Read-me!!! 5 .txt
  • %User Profile%\Desktop\Read-me!!! 6 .txt
  • %User Profile%\Desktop\Read-me!!! 7 .txt
  • %User Profile%\Desktop\Read-me!!! 8 .txt
  • %User Profile%\Desktop\Read-me!!! 9 .txt
  • %User Profile%\Desktop\Read-me!!! 10 .txt
  • %User Profile%\Desktop\Read-me!!! 11 .txt
  • %User Profile%\Desktop\Read-me!!! 12 .txt
  • %User Profile%\Desktop\Read-me!!! 13 .txt
  • %User Profile%\Desktop\Read-me!!! 14 .txt
  • %User Profile%\Desktop\Read-me!!! 15 .txt
  • %User Profile%\Desktop\Read-me!!! 16 .txt
  • %User Profile%\Desktop\Read-me!!! 17 .txt
  • %User Profile%\Desktop\Read-me!!! 18 .txt
  • %User Profile%\Desktop\Read-me!!! 19 .txt

(Note: %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It leaves text files that serve as ransom notes containing the following text:

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.670.01

FIRST VSAPI PATTERN DATE:

17 Jan 2020

VSAPI OPR PATTERN File:

15.671.00

VSAPI OPR PATTERN Date:

18 Jan 2020

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

     
    • Troj.Win32.TRX.XXPE50FFF034

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 4

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden files and folders in the search result.
  • %User Profile%\Desktop\Read-me!!! 0 .txt
  • %User Profile%\Desktop\Read-me!!! 1 .txt
  • %User Profile%\Desktop\Read-me!!! 2 .txt
  • %User Profile%\Desktop\Read-me!!! 3 .txt
  • %User Profile%\Desktop\Read-me!!! 4 .txt
  • %User Profile%\Desktop\Read-me!!! 5 .txt
  • %User Profile%\Desktop\Read-me!!! 6 .txt
  • %User Profile%\Desktop\Read-me!!! 7 .txt
  • %User Profile%\Desktop\Read-me!!! 8 .txt
  • %User Profile%\Desktop\Read-me!!! 9 .txt
  • %User Profile%\Desktop\Read-me!!! 10 .txt
  • %User Profile%\Desktop\Read-me!!! 11 .txt
  • %User Profile%\Desktop\Read-me!!! 12 .txt
  • %User Profile%\Desktop\Read-me!!! 13 .txt
  • %User Profile%\Desktop\Read-me!!! 14 .txt
  • %User Profile%\Desktop\Read-me!!! 15 .txt
  • %User Profile%\Desktop\Read-me!!! 16 .txt
  • %User Profile%\Desktop\Read-me!!! 17 .txt
  • %User Profile%\Desktop\Read-me!!! 18 .txt
  • %User Profile%\Desktop\Read-me!!! 19 .txt

Step 5

Scan your computer with your Trend Micro product to delete files detected as Ransom.MSIL.ONYXLOCKER.A. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:

Step 6

Restore encrypted files from backup.


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